Volcanic Materials
This can be composed of silica-rich or basaltic lava.
Magma
This is where lava and pyroclastic materials are ejected from a volcano.
These are the most beautiful and can be the most dangerous type of volcano.
Composite Cones
These lens shaped intrusions are formed when magma is intruded between sedimentary layers close to the surface.
Laccoliths
This term means a substance's resistance to flow.
Viscosity
This terms means rock broken by fire and includes the particles made in volcanic eruptions.
Pyroclastic Materials
Volcanic activity normally starts here at the crust.
Fissure/crack
This type of volcano is simple shaped with a steep sided slope. There are thousands of them on Earth.
Cinder Cones
These parallel intrusions are made when magma is injected along sedimentary bedding surfaces.
Sills
This term describes a mudflow that is saturated by water.
Lahar
Pahoehoe and Aa are types of
lava flows
This is a large depression in a volcano
Caldera
Most of these volcanoes are mast from deep ocean floor and form islands.
Shield Volcano
These are the largest intrusive bodies and may form the core of most mountain ranges.
Batholiths
This term describes when pressure drops and hot magma plumes rise to the surface.
Decompression Melting
These are 3 common things that escape from a volcano and account for 1-6% of its total weight.
Water vapor, CO2, Nitrogen
These are volcanic landforms that are similar and can be location where rock is present after erosion or where diamonds can be found.
Necks/Pipes
This describes volcanoes that can be found in a plate rather than on a plate boundary.
Intraplate Volcano/Volcanism
These sheetlike intrusions are made when magma is injected into fractures that cut across pre-existing rock.
Dikes
A change in the temperature with depth is called a
Geothermal Gradient
These are the 3 factors that affect eruptions and determine if the eruption is quiet or violent.
Composition & Temp of magma and amount of dissolved gases
These cover a wide area and are a result of a great deal of hardened lava. One example spreads across parts of Washington, Oregon, and Idaho.
Lava Plateau
The name and location of the most active volcano on earth.
These are structures that are made from cooling/hardening of magma at depth. They are collectively classified by size, shape, and relationship to the surround rock layers.
Plutons
Magma is determined by these 3 major things.
Heat, Pressure, Temp